Automatic stove-damper.



T. MEADOR. AUTOMATIC STOVE DAMPER. APPLICATION FILED FEB. 17' 1915.

1,143,422. Patented June 15, 1915.

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THE NORRIS PETERS 60.. PHO'm-LITHQ. WASHINGTON, D. c.

.trated in which TANDY MEADOR, on wnsrivronnnnivn, TENNESSEE.

- AUTOMATIC STOVE-DAMPER;

Specification of Letters Patent. Patented J 1 1g 15, 1915,

Application filed February 1' 7, 1915 Serial N 0. 8,809.

To allwlzomz't mayconcermM. V

,Be it known that I, TANbY MEADoIgja citizen of the United States, residing .at Westmoreland, in the county of Summer and State of Tennessee, have invented certain new anduseful Improvements in Automatic Stove-Dampers, and I do hereby declaref the following to be a full, clear, and eXact description or the invention, such as will enable others skilled in the art tofwhich it appertains to makeand use the same.

This invention relates to antomatic stove dampers, the principal objectof the invention being to secure a uniform temperature in a room, and to utilize the expansion and contractionof the stove pipe for setting the damper which regulates the temperature.

The foregoing and other objectshmay be attained by means of the construction illusthe accompanying. drawings, in

Figure 1 is a perspectiveviewofan automatic damper made in accordance with this invention, and shown connected to a long pipe to be connected to the stove Fig. 2

v is a view in elevation of the damper regu- 7 suitable handle, 6 for turning the same and lator and showing the steni forthedamper in section, Fig. 3 1s a central vertical section throughthe same, Fig. 4 is a horizontal section through the pipe and showing-a por designates a long pipe, made of a single piece instead of a number'of pipe joints, for the reason that expansion of this pipe operates the damper and if made in sections would not operate properly. Connected to the pipe on one side thereof is a curved plate .2 secured by rivets 3 to the pipe 1. Secured within the pipe is an adjustable damper 4:, which may be of the usual or any suitable construction provided with an operating'rod 5 extending through the-pipe "and through theplate 2 and provided with a I adjusting it within the pipe toxregulate the draft through the pipe. The operating rod 5 is provided with a rib 7, and the-opening in the pipe through which the operating rod 5 passes is providedwith a key hole-slot,

so that the'rib Tmay'be pulledout or pushed in beyond the pipe in order to permit the damper to be turned independently of the automatic attachment. A spring 8 encircles the operating rod 5 outside the pipe, one end of said. spring bearing against the handle ,6 and the other end against a cap 9 which bears against a dial or disk 10, the latter being provided with a radial slot 11 and indicating marks 12 at the side of said slot. A lever 13 is provided with a pin 14:

Wl110l1 projects through the slot 11, and the lower end of the lever 13 is offset and is pivoted at 15 to a suitable stud V or bearing 16. The ofiset end 17 of the lever 13 is pivotally connected at 18 to a rod 19, said rod 19 being mounted in a guide or strap 20 secured to the plate 2, whilethe lower end of the rod '19 passes through a bearing member21, and may slide therein and be adjusted in any desired position by means of a binding screw 22. An operating handle .23 preferably formed of some non-heat conducting material is connected to the bearing 21 at its'upper end and the lower end is mounted in a collar 24 atthe lower In the disk or diallO is an indicating hole 25, and when the groove 27 in the cap 9 is immediately under thehole 25, the rib 7 on the operating rod 5 maybe pushed in or withdrawn through the key hole slot in the pipe 1 and in the plate 2 and disk 10. When the handle is pushed in so that the rib 7 is inside the pipe, the damper 4 may be used independently of the automatic attachment. When the rib is outside the pipe and engaged with the key hole slot in the disk 10, the movement of the disk will also move the damper. The disk 10 isalso provided with end of the pipe 1.

an indicating hole 26 which is disposed on the disk at a point to indicate when the damper is vertical in the pipe.

The operation of the invention may be briefly described as follows: The pin 14 may be adjusted in theslot 11 to any desired temperature which it is required to maintain in the room. When the heat is excessive, the pipe 1 is expanded, and this will rotate the disk and with it the damper 4, and the damper will be practically closed. When the temperature drops to a few degrees below the desired temperature, the

' damper will be gradually opened until it attains the required temperature when it will be again closed and so on during the time that fuel is placed in the stove or heater.

From the foregoing it will be obvious that a damper regulator made in accordancewith this invention is comparatively simple in construction, will be economical in the saving of fuel, and will give the desired temperature and maintain it in a room at all times when there is fire in the stove or heater.

Various changes may be made in the details of constructionv without departing from the spirit and scope of the invention as defined in the claims;

What is claimed is 1. An automatic damper comprising a long pipe, a damper mounted in said pipe and'provided with a handle, a spring mounted on the operating rod of the damper outside the pipe, a rib on said operating rod extending through a key hole slot in the pipe, a plate provideclwith a key hole slot through which said rib extends, and a dial or disk mounted on the operating rod and also provided with a key hole slot for said rib, a spring mounted on the operating rod and bearing against the handle at one end and against the disk at the other end, whereby said damper may be used independently of the attachment, a lever provided with a pin extending'through a slot in said dial, means for adjusting said dial to required temperature, and means operated by the expansionand contraction of the pipe for setting the damper at the desired position to a give the required temperature.

An automatic damper comprising a long pipe, a damper mounted in said pipe in presence of two Witnesses 1 1 bearing against the handle at one end and 7 against the disk at the other end, whereby said damper can be used independently of the attachment, a lever provided withapin extending through a radial slot in said disk,

a bearing secured to the plate, the lower portion of the lever being pivotedto the bearing, an offset on lowerportion of the lever, a rod pivotally connected to said ofiset, a guide and a bearing'for said rod,

rod s'lidably mounted said bearing, a "set screwin said bearing, whereby said rod can be adjusted to various positions, a collar secured to the lower part of the pipe,a non-heat conducting operating handle, said rod bearing and at its lower portion secured to said collar, whereby said damper be operated to the desired positidnthe expansioii and contraction of the pipe. v

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